21205509

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{613}}^1\times {\mathrm{887}}^1$

素因数の和:1516

約数の個数: 16

約数和(自身を含む): 30532992

約数和(自身を除く): 9327483

約数列:

[1, 3, 13, 39, 613, 887, 1839, 2661, 7969, 11531, 23907, 34593, 543731, 1631193, 7068503, 21205509]

約数ペア:

[(1, 21205509), (3, 7068503), (13, 1631193), (39, 543731), (613, 34593), (887, 23907), (1839, 11531), (2661, 7969)]